Building near the coast or a creek in Westlake Village, California
Westlake Village has no general setback from the lake or creeks in the code and neighborhood conditions we reviewed. The main rules are the City's floodplain regulations: building in a FEMA special flood hazard area needs a development permit from the City Engineer, and new or substantially improved homes must sit at least 1 foot above base flood elevation. Lakefront lots also follow their neighborhood's conditions of approval and HOA rules.
| Where floodplain rules apply | FEMA special flood hazard areas [1] |
| Permit needed | Floodplain development permit before any construction [2] |
| Who reviews | Floodplain Administrator (City Engineer) [3] |
| Lowest floor elevation | At least 1 foot above base flood elevation [4] |
| Substantial improvement threshold | Cost of 50% or more of the structure's market value [5] |
| Lakefront rear yards (Lakeshore) | Ramps and piers permitted; rear setback can be zero [9] |
No general lake or creek setback found
The zoning chapters we reviewed contain no shoreline or creek setback, coastal zone rules, or vegetation-clearing limits tied to water. Building near the lake or a creek is controlled mostly by the floodplain chapter and by neighborhood conditions of approval.
Floodplain management
The floodplain rules apply in special flood hazard areas mapped by FEMA [1]. "Watercourse" includes lakes, creeks, streams, washes and channels [7]. Inside those areas:
- You need a development permit before any construction or other development starts [2]. The Floodplain Administrator, who is the City Engineer, reviews it [3] and confirms that other required state and federal permits have been obtained [8].
- New homes, and existing homes being substantially improved, must have the lowest floor at least 1 foot above base flood elevation [4].
- A "substantial improvement" is work costing 50% or more of the structure's market value [5]. Smaller remodels and additions don't trigger the elevation rule.
- Nothing can encroach into a mapped floodway, including fill or new construction, unless an engineer or architect certifies it won't raise base flood elevations [6].
Lakefront lots
Several lake-area neighborhoods have conditions of approval that supersede the code [11]. In Lakeshore, ramps, piers and related facilities are allowed in the rear yards of lake-front lots [9]. Rear setbacks for homes, pools and walls can be reduced to zero if homes on adjoining lots stay 30 feet apart [10]. In Southshore and Westlake Island, the rear setback is also zero, as long as structures stay at least 30 feet from the main home on the lot behind [12]. We read all six neighborhoods' conditions: only Lakeshore's mention lake-related facilities, and none sets a setback from the water itself.
State rules
Work that alters a creek's or lake's bed or bank may need state notification; see the state rules.
Next steps
- Check FEMA's flood map (or ask the City Engineer at City Hall, 31200 Oak Crest Drive) to see whether your lot is in a special flood hazard area.
- If it is, apply for a floodplain development permit with elevation information before starting construction.
- For lakefront lots, review your neighborhood's conditions of approval on the City's Residential Development & Design Standards page and get HOA approval.
- Get a Zoning Clearance from the Planning Department (818-706-1613) and a building permit from L.A. County Building & Safety.
Common questions
- Is there a setback from the lake in Westlake Village, California?
- No general one. The code and neighborhood conditions we reviewed set no setback from the lake or creeks. Building near the water is controlled mainly by the floodplain rules and lakefront neighborhood conditions of approval.
- Do I need a floodplain permit to build in Westlake Village, California?
- Yes, if your lot is in a FEMA special flood hazard area. You need a development permit from the City Engineer before any construction starts, and new or substantially improved homes must have the lowest floor at least 1 foot above base flood elevation.
- What counts as a substantial improvement in the floodplain in Westlake Village, California?
- Work costing 50% or more of the structure's market value. Smaller remodels and additions don't trigger the elevation rule.
- What are the rules for lakefront lots in Westlake Village, California?
- In Lakeshore, ramps and piers are allowed in rear yards of lake-front lots, and rear setbacks can be reduced to zero if homes on adjoining lots stay 30 feet apart. In Southshore and Westlake Island, the rear setback is zero if structures stay 30 feet from the main home behind.
California rules for building near the coast and creeks
California has no statewide shoreland setback. Near water, two state laws matter most.
The coastal zone (Coastal Act, Pub. Res. Code §30000 et seq.):
- Almost any development in the coastal zone needs a coastal development permit (CDP) (§30600). "Development" is broad: buildings, additions, grading, lot splits, removing major vegetation, and changes in intensity of use (§30106).
- The zone generally runs about 1,000 yards inland from mean high tide (up to 5 miles in some habitat areas, less in some cities). San Francisco Bay is excluded; BCDC regulates it (§30103).
- Where a city or county has a Local Coastal Program (LCP) certified by the Coastal Commission, it issues the CDP (§30519). Otherwise the Commission does.
- Local approvals can be appealed to the Coastal Commission for projects between the sea and the first public road, within 300 ft of a beach or the mean high tide line, within 100 ft of a wetland, estuary or stream, or within 300 ft of a coastal bluff (§30603).
- Some improvements to existing homes and repairs are exempt (§30610), with exceptions set by regulation.
Creeks, streams and lakes statewide: you must notify the Department of Fish and Wildlife before work that diverts or blocks a stream, changes its bed, channel or bank, or puts material into it (Fish & Game Code §1602), even for streams that are dry part of the year. CDFW may require a Lake or Streambed Alteration Agreement.
Cities and counties often add their own creek setbacks or riparian buffers.
What the ordinance says
- Sec. 8.5.025(A), Municipal Code Article 8 Building Regulations (8.1 building code incl. pool provisions; 8.5 floodplain management), p. 1
Lands to which this Chapter Applies. This Chapter shall apply to all special flood hazard areas within the jurisdiction of the City.
- Sec. 8.5.030(A), Municipal Code Article 8 Building Regulations (8.1 building code incl. pool provisions; 8.5 floodplain management), p. 1
A development permit shall be obtained before any construction or other development, including manufactured homes, begins within any area of special flood hazard.
- Sec. 8.5.020 (Definitions), Municipal Code Article 8 Building Regulations (8.1 building code incl. pool provisions; 8.5 floodplain management), p. 1
"Floodplain Administrator" is the City Engineer.
- Sec. 8.5.035(A)(3)(a), Municipal Code Article 8 Building Regulations (8.1 building code incl. pool provisions; 8.5 floodplain management), p. 1
The lowest floor, including basement, of any new residential construction and any existing residential building which is improved in a manner that meets the definition of substantial improvement, shall be elevated at least one foot above the base flood elevation.
- Sec. 8.5.020 (Definitions), Municipal Code Article 8 Building Regulations (8.1 building code incl. pool provisions; 8.5 floodplain management), p. 1
"Substantial improvement" means any reconstruction, rehabilitation, addition, or other proposed new development of a structure, the cost of which equals or exceeds fifty (50) percent of the market value of the structure before the "start of construction" of the improvement.
- Sec. 8.5.035(F)(1), Municipal Code Article 8 Building Regulations (8.1 building code incl. pool provisions; 8.5 floodplain management), p. 1
There shall be no encroachment into a floodway, including fill, new construction, substantial improvement, and other new development unless certification by a registered professional civil engineer or architect is provided demonstrating that encroachments shall not result in any increase in the base flood elevation during the occurrence of the base flood discharge.
- Sec. 8.5.020 (Definitions), Municipal Code Article 8 Building Regulations (8.1 building code incl. pool provisions; 8.5 floodplain management), p. 1
"Watercourse" means a lake, river, creek, stream, wash, arroyo, channel or other topographic feature on or over which waters flow at least periodically.
- Sec. 8.5.030(C)(1)(b), Municipal Code Article 8 Building Regulations (8.1 building code incl. pool provisions; 8.5 floodplain management), p. 1
All other required state and federal permits have been obtained;
- Lakeshore Conditions of Approval, condition 3, Neighborhood Conditions of Approval - Lakeshore, p. 1
Ramps, piers, and related facilities are permitted within the rear yard of lots with lake frontage and within open areas fronting the lake.
- Lakeshore Conditions of Approval, condition 9, Neighborhood Conditions of Approval - Lakeshore, p. 1
The rear yard setback may be reduced to zero for all structures and equipment, including dwelling units, garages, swimming pools, and walls, so long as there is a minimum of 30 feet between dwelling units on adjoining lots to the rear.
- City webpage, Residential Development & Design Standards, Residential Development & Design Standards - City webpage (neighborhood conditions of approval), p. 1
In those cases, the special conditions supersede any conflicting standards in the Municipal Code.
- Southshore and Westlake Island Conditions of Approval, condition 4, Neighborhood Conditions of Approval - Southshore and Westlake Island, p. 1
The minimum rear yard setback is zero except that all structures must be located at least 30 feet away from the main dwelling unit on the rear adjoining lot.